package co.yixiang.service.impl;

import co.yixiang.domain.QiniuConfig;
import co.yixiang.domain.QiniuContent;
import co.yixiang.service.QiNiuService;
import co.yixiang.utils.*;
import com.alibaba.fastjson.JSON;
import com.qcloud.cos.model.COSObjectSummary;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.DefaultPutRet;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;
import co.yixiang.repository.QiniuContentRepository;
import co.yixiang.service.dto.QiniuQueryCriteria;
import co.yixiang.exception.BadRequestException;
import co.yixiang.repository.QiNiuConfigRepository;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @author Zheng Jie
 * @date 2018-12-31
 */
@Slf4j
@Service
@CacheConfig(cacheNames = "qiNiu")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true, rollbackFor = Exception.class)
public class QiNiuServiceImpl implements QiNiuService {

    private final QiNiuConfigRepository qiNiuConfigRepository;

    private final QiniuContentRepository qiniuContentRepository;

    public QiNiuServiceImpl(QiNiuConfigRepository qiNiuConfigRepository, QiniuContentRepository qiniuContentRepository) {
        this.qiNiuConfigRepository = qiNiuConfigRepository;
        this.qiniuContentRepository = qiniuContentRepository;
    }

    @Value("${qiniu.max-size}")
    private Long maxSize;

    @Override
    @Cacheable
    public Object queryAll(QiniuQueryCriteria criteria, Pageable pageable) {
        return PageUtil.toPage(qiniuContentRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root, criteria, criteriaBuilder), pageable));
    }

    @Override
    public List<QiniuContent> queryAll(QiniuQueryCriteria criteria) {
        return qiniuContentRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root, criteria, criteriaBuilder));
    }

    @Override
    @Cacheable(key = "'1'")
    public QiniuConfig find() {
        Optional<QiniuConfig> qiniuConfig = qiNiuConfigRepository.findById(1L);
        return qiniuConfig.orElseGet(QiniuConfig::new);
    }

    @Override
    @CachePut(cacheNames = "qiNiuConfig", key = "'1'")
    @Transactional(rollbackFor = Exception.class)
    public QiniuConfig update(QiniuConfig qiniuConfig) {
        String http = "http://", https = "https://";
        if (!(qiniuConfig.getHost().toLowerCase().startsWith(http) || qiniuConfig.getHost().toLowerCase().startsWith(https))) {
            throw new BadRequestException("外链域名必须以http://或者https://开头");
        }
        qiniuConfig.setId(1L);
        return qiNiuConfigRepository.save(qiniuConfig);
    }

    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public QiniuContent upload(MultipartFile file, QiniuConfig qiniuConfig) {
        FileUtil.checkSize(maxSize, file.getSize());
        if (qiniuConfig.getId() == null) {
            throw new BadRequestException("请先添加相应配置，再操作");
        }
        // 构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(QiNiuUtil.getRegion(qiniuConfig.getZone()));
        UploadManager uploadManager = new UploadManager(cfg);
        Auth auth = Auth.create(qiniuConfig.getAccessKey(), qiniuConfig.getSecretKey());
        String upToken = auth.uploadToken(qiniuConfig.getBucket());
        try {
            String key = file.getOriginalFilename();
            if (qiniuContentRepository.findByKey(key) != null) {
                key = QiNiuUtil.getKey(key);
            }
            Response response = uploadManager.put(file.getBytes(), key, upToken);
            //解析上传成功的结果

            DefaultPutRet putRet = JSON.parseObject(response.bodyString(), DefaultPutRet.class);
            //存入数据库
            QiniuContent qiniuContent = new QiniuContent();
            qiniuContent.setSuffix(FileUtil.getExtensionName(putRet.key));
            qiniuContent.setBucket(qiniuConfig.getBucket());
            qiniuContent.setType(qiniuConfig.getType());
            qiniuContent.setKey(FileUtil.getFileNameNoEx(putRet.key));
            qiniuContent.setUrl(qiniuConfig.getHost() + "/" + putRet.key);
            qiniuContent.setSize(FileUtil.getSize(Integer.parseInt(file.getSize() + "")));
            return qiniuContentRepository.save(qiniuContent);
        } catch (Exception e) {
            throw new BadRequestException(e.getMessage());
        }
    }

    @Override
    @Cacheable
    public QiniuContent findByContentId(Long id) {
        QiniuContent qiniuContent = qiniuContentRepository.findById(id).orElseGet(QiniuContent::new);
        ValidationUtil.isNull(qiniuContent.getId(), "QiniuContent", "id", id);
        return qiniuContent;
    }

    @Override
    @Cacheable
    public String download(QiniuContent content, QiniuConfig config) {
        String finalUrl;
        String type = "公开";
        if (type.equals(content.getType())) {
            finalUrl = content.getUrl();
        } else {
            Auth auth = Auth.create(config.getAccessKey(), config.getSecretKey());
            // 1小时，可以自定义链接过期时间
            long expireInSeconds = 3600;
            finalUrl = auth.privateDownloadUrl(content.getUrl(), expireInSeconds);
        }
        return finalUrl;
    }

    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public void delete(QiniuContent content, QiniuConfig config) {
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(QiNiuUtil.getRegion(config.getZone()));
        Auth auth = Auth.create(config.getAccessKey(), config.getSecretKey());
        BucketManager bucketManager = new BucketManager(auth, cfg);
        try {
            bucketManager.delete(content.getBucket(), content.getKey() + "." + content.getSuffix());
            qiniuContentRepository.delete(content);
        } catch (QiniuException ex) {
            qiniuContentRepository.delete(content);
        }
    }

    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public void synchronize(QiniuConfig config) {
        if (config.getId() == null) {
            throw new BadRequestException("请先添加相应配置，再操作");
        }
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(QiNiuUtil.getRegion(config.getZone()));
        Auth auth = Auth.create(config.getAccessKey(), config.getSecretKey());
        BucketManager bucketManager = new BucketManager(auth, cfg);
        //文件名前缀
        String prefix = "";
        //每次迭代的长度限制，最大1000，推荐值 1000
        int limit = 1000;
        //指定目录分隔符，列出所有公共前缀（模拟列出目录效果）。缺省值为空字符串
        String delimiter = "";
        //列举空间文件列表
        BucketManager.FileListIterator fileListIterator = bucketManager.createFileListIterator(config.getBucket(), prefix, limit, delimiter);
        while (fileListIterator.hasNext()) {
            //处理获取的file list结果
            QiniuContent qiniuContent;
            FileInfo[] items = fileListIterator.next();
            for (FileInfo item : items) {
                if (qiniuContentRepository.findByKey(FileUtil.getFileNameNoEx(item.key)) == null) {
                    qiniuContent = new QiniuContent();
                    qiniuContent.setSize(FileUtil.getSize(Integer.parseInt(item.fsize + "")));
                    qiniuContent.setSuffix(FileUtil.getExtensionName(item.key));
                    qiniuContent.setKey(FileUtil.getFileNameNoEx(item.key));
                    qiniuContent.setType(config.getType());
                    qiniuContent.setBucket(config.getBucket());
                    qiniuContent.setUrl(config.getHost() + "/" + item.key);
                    qiniuContentRepository.save(qiniuContent);
                }
            }
        }
    }

    @Override
    @CacheEvict(allEntries = true)
    public void deleteAll(Long[] ids, QiniuConfig config) {
        for (Long id : ids) {
            deleteTencentCOS(findByContentId(id), config);
        }
    }

    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public void update(String type) {
        qiNiuConfigRepository.update(type);
    }

    @Override
    public void downloadList(List<QiniuContent> queryAll, HttpServletResponse response) throws IOException {
        List<Map<String, Object>> list = new ArrayList<>();
        for (QiniuContent content : queryAll) {
            Map<String, Object> map = new LinkedHashMap<>();
            map.put("文件名", content.getKey());
            map.put("文件类型", content.getSuffix());
            map.put("空间名称", content.getBucket());
            map.put("文件大小", content.getSize());
            map.put("空间类型", content.getType());
            map.put("创建日期", content.getUpdateTime());
            list.add(map);
        }
        FileUtil.downloadExcel(list, response);
    }

    /**
     * 图片素材库上传腾讯云
     *
     * @param file        文件
     * @param qiniuConfig 配置
     * @return
     */
    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public QiniuContent tencentUploadPicture(MultipartFile file, QiniuConfig qiniuConfig) {
        FileUtil.checkSize(maxSize, file.getSize());
        if (qiniuConfig.getId() == null) {
            throw new BadRequestException("请先添加相应配置，再操作");
        }
        // 构造一个带指定Zone对象的配置类
        try {
            //生成8位随机数
            Random random = new Random();
            int nex = 10000000 + random.nextInt(90000000);
            //获取上传文件名称(去除文件名中的逗号)
            String filename = file.getOriginalFilename().replace(",", "");
            filename = String.valueOf(nex) + filename;
            if (qiniuContentRepository.findByKey(filename) != null) {
                filename = QiNiuUtil.getKey(filename);
            }
            //上传到腾讯云
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy");
            SimpleDateFormat sdf1 = new SimpleDateFormat("MM");
            //完成目录加文件名
            String fullpath = sdf.format(new Date()) + "/" + sdf1.format(new Date()) + "/" + filename;
            TencentCOSUtils.uploadfile(file.getInputStream(), fullpath, qiniuConfig);
            //存入数据库
            QiniuContent qiniuContent = new QiniuContent();
            qiniuContent.setSuffix(FileUtil.getExtensionName(filename));
            qiniuContent.setBucket(qiniuConfig.getBucket());
            qiniuContent.setType(qiniuConfig.getType());
            qiniuContent.setKey(FileUtil.getFileNameNoEx(filename));
            qiniuContent.setUrl(qiniuConfig.getHost() + "/" + fullpath);
            qiniuContent.setSize(FileUtil.getSize(Integer.parseInt(file.getSize() + "")));
            return qiniuContentRepository.save(qiniuContent);
        } catch (Exception e) {
            throw new BadRequestException(e.getMessage());
        }
    }

    /**
     * 文件上传腾讯云
     *
     * @param file        文件
     * @param qiniuConfig 配置
     * @return
     */
    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public QiniuContent tencentUpload(MultipartFile file, QiniuConfig qiniuConfig) {
        FileUtil.checkSize(maxSize, file.getSize());
        if (qiniuConfig.getId() == null) {
            throw new BadRequestException("请先添加相应配置，再操作");
        }
        // 构造一个带指定Zone对象的配置类

        try {
            //获取上传文件名称(去除文件名中的逗号)
            String filename = file.getOriginalFilename().replace(",", "");
            if (qiniuContentRepository.findByKey(filename) != null) {
                filename = QiNiuUtil.getKey(filename);
            }
            //上传到腾讯云
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy");
            SimpleDateFormat sdf1 = new SimpleDateFormat("MM");
            //完成目录加文件名
            String fullpath = sdf.format(new Date()) + "/" + sdf1.format(new Date()) + "/" + filename;
            TencentCOSUtils.uploadfile(file.getInputStream(), fullpath, qiniuConfig);
            //存入数据库
            QiniuContent qiniuContent = new QiniuContent();
            qiniuContent.setSuffix(FileUtil.getExtensionName(filename));
            qiniuContent.setBucket(qiniuConfig.getBucket());
            qiniuContent.setType(qiniuConfig.getType());
            qiniuContent.setKey(FileUtil.getFileNameNoEx(filename));
            qiniuContent.setUrl(qiniuConfig.getHost() + "/" + fullpath);
            qiniuContent.setSize(FileUtil.getSize(Integer.parseInt(file.getSize() + "")));
            return qiniuContentRepository.save(qiniuContent);
        } catch (Exception e) {
            throw new BadRequestException(e.getMessage());
        }
    }

    /**
     * 同步腾讯云数据
     *
     * @param config 腾讯云配置
     */
    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public void synchronizeTencentCOS(QiniuConfig config) {
        if (config.getId() == null) {
            throw new BadRequestException("请先添加相应配置，再操作");
        }

        //文件名前缀
        String prefix = "";
        //每次迭代的长度限制，最大1000，推荐值 1000
        int limit = 1000;
        //指定目录分隔符，列出所有公共前缀（模拟列出目录效果）。缺省值为空字符串
        String delimiter = "";
        //列举空间文件列表
        List<COSObjectSummary> cosObjectSummaries = TencentCOSUtils.listObjects(limit, delimiter, prefix, config);
        //处理获取的file list结果
        QiniuContent qiniuContent;

        for (COSObjectSummary item : cosObjectSummaries) {
            try {
                if (item.getKey().lastIndexOf(".") > -1 && qiniuContentRepository.findByUrl(config.getHost() + "/" + item.getKey()) == null) {
                    qiniuContent = new QiniuContent();
                    qiniuContent.setSize(FileUtil.getSize(Integer.parseInt(item.getSize() + "")));
                    qiniuContent.setSuffix(FileUtil.getExtensionName(item.getKey()));
                    int begin = item.getKey().lastIndexOf("/") + 1;
                    int end = item.getKey().lastIndexOf(".");
                    String fileName = item.getKey().substring(begin, end);
                    qiniuContent.setKey(fileName);
                    qiniuContent.setType(config.getType());
                    qiniuContent.setBucket(config.getBucket());
                    qiniuContent.setUrl(config.getHost() + "/" + item.getKey());
                    qiniuContentRepository.save(qiniuContent);
                }
            }catch (Exception e){
                log.error("同步云下载异常记录："+item.getKey());
            }

        }
    }

    /**
     * 删除腾讯云上文件与表中数据
     *
     * @param content 文件
     * @param config  配置
     */

    @Override
    @CacheEvict(allEntries = true)
    @Transactional(rollbackFor = Exception.class)
    public void deleteTencentCOS(QiniuContent content, QiniuConfig config) {
        //截取文件路径
        int begin = content.getUrl().lastIndexOf(".com") + 4;
        String key = content.getUrl().substring(begin, content.getUrl().length());
        TencentCOSUtils.deletefile(key, config);
        qiniuContentRepository.delete(content);
    }
}
